Channel type clamp for slip joints



Feb. 1', 1949. R. MARKEY 2,460,646

CHANNEL TYPE CLAMP FOR SLIP,JOINTS Filed March 30, 1945 INVENTOR I Y RoscoeZ/Zmkey ATTORN EY Patented Feb. 1, 1 949 UNITED STAT CHANNEL TYPE cLAMP FOR SLIP JOINTS Roscoe I. MarkeLjMontclair, N. J;, assignor, by

mesne assignments, to Noma Electric Corporation, New York, land N. Y., a corporation of Mary- Application arceau, 1945, Serial-No. 585,720 3 Claims. (01. 285-129) The invention relates to a channel type-clamp and is particularly adapted'for'use in slip joints of exhaust manifold systems of aircraft engines.

It is well known that considerable expansion and contraction takes place in exhaust manifold systems of aircraft engines due to changes of temperature. As a result of this condition joints have to'be interposed in the collector ring and its connections such as the tail pipe and branch pipes.

The principal object of the present invention is to provide an exceedingly simple form of joint which permits of diametrical and longitudinal expansion and contraction of the parts due to changes in temperature. The construction while simple is rugged and materially aids in reinforcing the ends of the tubular members which are to be connected together.

Other objects and advantages will become apparent as this specification proceeds. Referring to the drawings forming a part thereof and in which preferred embodiments of the invention are illustrated:

Fig. 1 is an elevational view, parts away and in section;

Fig. 2 is a cross sectional view taken on line 22 of Fig. 1;

Fig. 3 is a fragmentary elevation-a1 view, the channel-shaped split clamping ring being in section, and shows a means for preventing rotation of the parts; and

Fig. 4 is a fragmentary section-a1 view taken on line 4-4 of Fig. 3.

In the drawing, the two tubular members to be locked together are designated by the reference numerals 5 and 6 and they might be any two parts of an exhaust manifold system for aircraft engines.

The tubular member 5 has a circumferential ring 1 resistance welded thereto at a distance somewhat remote from its end, the welding being indicated at 8. This ring is comparatively narrow in width.

being broken The tubular member 6 has a comparatively:

wide ring 9 welded thereto, the welding being indicated at II]. It will be noted as particularly shown in Fig. 1 that a substantial part of the ring 9 overhangs this end of the tubular member 6 and the end of the tubular member 5 beyond the ring I enters into and engages the overhanging part of the ring 9.

We will assume with the parts in the position of Fig. 1, the engine is not running, the parts are cool and are in what might be termed the contracted position. When the longitudinal exthickness of the rings.

pansion occurs due to the intense heat set up in the manifold system by the running engine the ends of the tubular members 5 and 8 may move toward each other into the space H which is provided for that purpose andthe rings 1 and 9 may move toward each other into the space 12 which is likewise provided for that purpose.

The rings I and 9 being of a rugged construction. in comparison to the tubular members in addition to functioning as heretofore described act to reinforce the ends of the tubular members.

The split locking ring I3 is channel-shaped in cross section andv is of the same depth as the It takes over the rings as shown in Fig. land thus positively holds the ends of the tubular members 5 and 6 together and helps in forming a substantially gas tight connection. A split liner l4 may be interposed between the rings 1 and 9 and the split locking ring 13 if desired.

7 The ends of the split clamping member l3 are secured together with a snap toggle locking means I5 which permits of di-ametrical expansion and contraction of the parts due to changes in temperature. As shown in Fig. 2 this locking means is of a type described and illustrated in my pending application Serial No. 546,531, filed July 25, 1944, now Patent No. 2,390,801. However any other known type of locking means could be utilized providing it allows for diametrical expansion and contraction.

Figs. 3 and 4 illustrate a simple means of preventing rotation of the tubular members in relation to each other and for preventing rotation of the split locking ring in relation to the tubular members. This may or may not be used as desired and when it is used with the split liner 14 it is welded diametrically opposite the opening in the split liner to avoid restricting the flexibility of the clamp and liner.

A small segment is cut out of each of the rings as indicated at 16 and H. A block l8 of the same width as the cut out portions of the rings is welded to the locking ring as indicated at 19. When thisblock is fitted into the cut out portions of the rings 1 and 9 due to its being welded to the split locking ring l3 it will obviously prevent the ring l3 from turning in relation to tubular members 5 and 6. Likewise the rings 1 and 9 being welded to the tubular members 5 and 6 the block IB will prevent them turningin relaclearance between the ring or band 9 and the extended projection of the tubular member 5 will be greater than in a locked or fixed-joint and therefore more susceptible of leaking. The band on liner I4 provides a sealing surface on the outer periphery of the rings 1 and 9. The gap or split in the liner is spaced away from vtheggapin the split locking" wand thus functions to prevent the escape of gas through the gap in the split locking ring.

Such changes in details of construction as would occur to one skilled in the artare to be considered as coming within the spiritof 'the,

ingi axially outwardly therefrom in-overlapping engagement with the adjacent end of first-named member, and means including achannel-shaped split clamping ring cooperating with said first and'second named rings for holding said tubular conduit members against movement away from one another but permitting limited movement-of said members axially with respect-to one another to compensate for axial expansiongandrcontraction due to temperature changes. 7

2. In an exhaust manifold system having: a pair of tubular conduit members arranged end'to end; the combination of a relativelynarrow sannular ring mounted on the outer periphery of 'one'of said 'members adjacent one end thereof aind spaced axially inwardly therefrom, a'rela tively wide annular ring mounted on the outer periphery of the otherone of said members adjacent one end thereof and extendin axially-outwardly therefrom in overlapping iengagement with the 4 including a channel-shaped split clamping ring cooperating with said first and second named rings for holding said conduit members against movement away from one another but permitting limited movement of said members axially with respect to one another to compensate for axial ex- .pansion I aiid contraction due to temperature changes.

3. In an exhaust manifold system having a pair of tubular conduit members arranged end tdendythe combination of a relatively narrow annuiarringmounted on the outer periphery of one ofzsaid members adjacent one end thereof -andaspaced =aedally inwardly therefrom, a rela-- tively-lwide annular ring mounted on the outer periphery of the other one of said members ad- -jaoent one endthereof and extending axially outwar'dly therefrom in overlapping engagement with'the adjacent end of said first member, means including a channel-shaped split clamping ring,

430pcrating with said first and second named rings forholding said conduitmembers against moyementaway from one another but permitting limitedmovementofsaid members axially with respectto one another to compensate for vaxial expansion. and contraction due to temperature ch'angesandmeans' cooperatin with-said clamping ring constructed and arranged. topermit radial :expansionand contraction of the parts due to temperature changes. r ROSCOE I. MARKEY.

' REFERENCES CITED "Q'Ihe following references are'of record in the file ofthis patent:

adjacent end of said .first member andme'ans V UNITEDSTATES PATENTS Number .Name a Date 41,551 Treadway et al. v Feb. 9, 1864 669,673 "'Av'erbeck I Mart 12,1901 2,014,313 Damsel ..1 Sept. 10, 1935 2,027,824 Hunt Jan. 14; 1936 

